Since the pump is running you either have a frozen pipe in that zone or air in that zone. I don't see any purge stations on your boiler piping to get the air out. Purge station is a shut off valve and a hose drain valve

You can easily have air in one zone and not the other. Like I said before I don't see any way to purge the air out in your pics. Maybe you have bleeders on the baseboard. I'm logging off for the night. I've explained the likely culprits. I'd appreciate a favorable rating.

That just drains the boiler. It's not a purge station. Like I said before I don't see any purge stations in any of your pics. That means bleeders on the baseboard are the only place to get the air out IF the new baseboard is piped like the old radiators with a supply and return pipe off the main to each baseboard section

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Customer reply replied 1 month ago

Doesn’t the baseboard need to work have heat to have pressured to bleed ?

I bought a used pump today for $60 I installed it still not working I was a little upset because I took my old pump out And I plugged it with two wires and my old pump ran fine I should’ve thought of that first before I spend the $60 oh well ??

Customer reply replied 1 month ago

Only thing left I can think of is the Honeywell relay!! AQUASTAT RELAY TYPE L8148A ?

I'm going to open this up to my colleagues so one of them can help. Please don't respond (even to acknowledge this post)until you get a response from us. If you respond first it will only delay your answer.

I will tell you that...the things you have to go through to be an Expert are quite rigorous.

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